Apologies for the video being a little bit blurry, this was from last year! I had so much fun making these type of videos, though, can’t wait to add more production value to them! Thank you for watching and supporting! 
To listen while using other apps, switch the player to Picture-in-Picture (PiP) during playback — it keeps playing in a small floating window (the screen stays on).
To listen with the screen fully off, in-browser playback stops by YouTube's design. Open the video in the YouTube app to keep listening where background playback is supported (e.g. with YouTube Premium).
Open in YouTube app